honestly though, not even 10% would be able to cash out completely without collapsing the prices.
10% of what? of total bitcoin amount? that is 1,670,000
BTC that is 9.2 billion dollar. if you dump that much money on ANY market, it will crash and burn to the ground. it is not just bitcoin.
besides, such crash and burn will be temporary. earlier this year, it was some bug or a whale's bot that went crazy and dumped bitcoin on an exchange and crashed price to $0.10. guess how many minutes that price lasted before going back up?
Any market?
Check this out:
http://www.businessinsider.com/heres-how-much-currency-is-traded-every-day-2016-9HSBC notes that the decline in turnover was a result of a sharp drop in FX spot volumes, with the average daily volume falling to $1.65 trillion this year, a 19% decrease from three years earlier, which stood at over $2 trillion per day.
Forex volumes are 2 trillions, a 9.2 billion sell would mean a little over 0.5%.
Right now , even with all the hype cryptos are playing in the extra small league.
But look at the bright side, there is a a lot of room for growth.
The question is, who will be the first crypto billionaire.
I think Satoshi Nakamoto, whoever he/she is, became the one when Bitcoin crossed $2,000 mark.
And of course many people around the world became millionaires with cryptos otherwise having no chance to achieve that goal.
If we count his maximum possible coins he became a millionaire 4 years ago when bitcoin crossed 1000.
But there is always the possibility is not even a millionaire right now.
Hdd do crash, data can be lost, and most importantly....nobody lives forever