I am mining and trading bitcoins, Ethereum, litecoins on 3 continent (Asia, Europe, Middle East). But i always wanted a quiet back up with no maintenance tasks and no risks. For this reason I always add some cloud capacity at genesis. I have just bought the two year Houdini contract at genesis. I decided to buy more capacity at genesis because my previous eth investment repaid itself in less time that I thought. A couple of days after investing in the monero Houdini contract I receive promising daily payments and I already foresee that the investment will repay itself in a few months.
Cryptocurrency mining is a process by which new coins are introduced into the existing circulating supply, as well as a process used to secure the network the coin operates on. The people who mine a coin, are known as miners. Therefore, instead of having a central authority that controls and secures the money supply, this control and security is spread out across the network that miners help to maintain.

Btc.sx offers a 10 to 1 leveraged product based on BitStamp’s data feed. Similarly to Ava Trade, Btc.sx adds around 10$ to the spread at BitStamp. You will need a deposit of at least 0.01033 of a bitcoin in order to trade at Btc.sx. At current bitcoin prices of $638, this amounts to around 6.3$. Btc.sx is dually incorporated in England and Singapore. The exchange currently accepts only bitcoin deposits, no fiat currency deposits are allowed.
This is the most popular Bitcoin pair in the world. Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of Bitcoins is carried out collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls this cryptocurrency and everyone can take part. Bitcoin price grew significantly within a short period of time making the BTC/USD pair quite popular among active traders and investors. Through many of its unique properties, Bitcoin allows exciting uses that could not be covered by any previous payment system.
The problem with having an algorithm that is "easy to mine with" (referring to the ability to CPU or GPU mine profitably) is that mining should be hard in order to secure the network. When a mining algorithm is difficult to make ASICs for, there is a higher barrier to entry. A high barrier to entry increases the time that the first group to create ASICs will monopolize the market (and the time the network is vulnerable to a 51% attack from a single source). Many argue that the creators or the developers could simply change the mining algorithm when an ASIC is developed, but this defeats the purpose of decentralized consensus by causing centralization.[1]
Why submit an order to buy at $370 per bitcoin (XBT) and not $383.17? One may submit an order lower than the current price if one expects the price of Bitcoin to fall. In this case, since my order is lower than other offers in the orderbook, I won’t receive my order for 0.5 bitcoin immediately. Placing an order at a specified price is called a _limit order._ Before placing an order, be sure to check the orderbook for your trading pair.
Altcoins can differ from Bitcoin in a range of ways. Some have a different economic model or a different coin-distribution method, like altcoins that were given away to all citizens of a country. Others employ different proof-of-work mining algorithms, perhaps to resist specialized mining hardware — or maybe they don’t even rely on proof of work at all. Several altcoins offer a more versatile programming language to build applications on top of, while yet others offer more privacy compared to Bitcoin. And there are also altcoins that serve very specific, non-monetary use cases, like domain name registry or data storage pointers.
Hey, where’s Bitsane here? I guess you would like to add it to the list, don’t you mind? I am not an expert to state the pros and cons but I can share some personal opinion. You can get confused there sometimes cause me for instance - I can’t get all that rules and f.a.q.s and special info to know that youngsters get on with easily. But what I am relieved with is the rate of low costs of fees for transactions to put your money in and out (for I can’t stand that crazy part of giving a shitty load of money from your own pocket to the user fees god-knows-what-for). And there are also pretty quick to get through, which is suitable in urgent cases that occur currently. So, here is the exchange I strongly recommend to include in the list. Please consider.

Stox (STX ),  a distributed ledger technology (DLT ) based prediction platform that allows users to predict the outcome of events in various ecosystems including the cryptocurrency markets, sports, tech, and others, has responded to rumors making the rounds that its orchestrating an exit scam, according to a Finance Magnates report  on November 12, 2018.     Stox (STX) Not Running…

As video quality increases, bandwidth size is also required to increase, leading to higher CDN costs. The added expense puts additional pressure on industry gatekeepers, who often end up cutting into content creator profits. The Theta Network plans to solve these problems by incentivizing users, with Theta Token rewards, to transform their superfluous computational resources into videostream cache nodes.
If you’re European, Bitstamp is your best bet to get some bitcoins at a low cost. The company is based in Slovenia, part of the EU. Deposits by SEPA are free, withdrawals are charged a fixed 0.90€ fee once the funds are converted to Euros. Because Bitstamp only offers trading in BTC/USD (Bitcoin versus the US Dollar) all Euro transfers are immediately converted to Dollars. If you want to withdraw by SEPA, you have to convert your funds back to Euros.

no pb for payment, the service is fine. However, it lacks a confirmation that "you have begun to mine", because except the one of the payment, nothing indicates that it works ... we remain in the expectation ... (as far as the 1st mining does not appear until 24 hours later and that the 1st payment will not intervene before 16j for the BTC) it lacks a little message...
The Ethereum community fractured when a disagreement over how a technically legal theft of funds should be handled. The majority of users wished to change Ethereum’s code in order to get the lost funds back. A minority believed that Ethereum should not be tampered with or altered by third parties. Even in cases of users exploiting the smart contract feature to trick others, the Blockchain must remain “immutable.” Thus, the minority created the Classic version of Ethereum, which still survives and thrives.
Many of the altcoins are built up on the basic framework provided by Bitcoin. Thus most altcoins are peer-to-peer, involve a mining process by which users solve difficult problems to unlock blocks, and offer efficient and cheap ways to carry out transactions on the web. But even with many overlapping features, altcoins vary widely from each other - altocoins differ themselves from bitcoin with a range of procedural variations, including different proof-of-work algorithms, different means by which users can sacrifice energy to mine blocks, and application enhancements to increase user anonymity. 
By October 2009, the world’s first Bitcoin exchange was established. At the time, $1 was the equivalent of 1,309 Bitcoin. Considering how expensive Bitcoin is today, that was a real steal. Bitcoin traded at a fraction of a penny for quite some time. Things started changing in 2010; as the distribution of Bitcoin increased, the digital currency became inherently more valuable.