I think the value of bitcoin is still seen in the future, because now, it does not have as much use as you may have in a few years. Now it is just one exchange currency like several others. In a few years, it can be used as a means of payment if you find a way to make the transfer faster. In my view, the person who wants to invest in crypto-coins, should only put 5 to 10% of their capital, so as not to run the risk of bankruptcy if this type of investment goes wrong !!!