That is the simple and only requirement of every investment opportunity hence it is obvious here too with cryptos. Where you can make big money without enough capital ? But I guess bitcoin may give you a second chance. It is like if you will not get enough number of bitcoins which are essential to achieve some target money then you may need to wait some more time.

I mean to say to become millionaire in 2013, you might have needed 1000 bitcoins and in 2017 just 400 bitcoins will be more than enough to make you millionaire.