Digital currency was worth just $12 in 2013
the value of Bitcoin has gone up >800% since 1 Jan 2017.
And the total market of crypto currencies is up 1300%.
There’s fear on two sides: financial and technical.
Financial is mostly that it’s a bubble. Every time Bitcoin pulls back in price, someone says it’s a bubble.
Technical is that coins will be: lost, stolen/hacked, or just plain frauds.
There is nothing to support Bitcoin except the hope that you will sell it to someone for more than you paid for it. 
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