History price of each crypto will give you answer for that, since Bitcoin created and tradeable on the market the price is very high volatility, the price can be going up 10 to 20 times in afew month and then going down to 80% to 90%, so if you like to start hold Bitcoin or others crypto you have to start when the price already going down to 80% to 90% and then hold it until reach 10 or 20 times.