I would not recommend putting any money into bitcoin that you are not willing to lose. My personal take is that one or many of the tech stacks in the crypto currency space will be with us for the rest of our lives and those that support there implementation will be rewarded along with those who create them. Bitcoin will rise and fall based on how useful it turns out to be. If it is not used in the west aka "first world" it may end up being the money of the third. Suffice it to say you should figure out your tolerance for volatility and your buy sell points. Don't fall in love with money or investments, they will never love you back... One other note. The limit on number of bitcoin at 21m only tells you what % to total supply you have. AKA 21 would be one millionth of the total supply... What is available at a price and time may be much less than the total and in general bitcoin it is not widely held. Finding a buyer when you want one may be a challenge.