Is it too late to start investing in crypto currencies ? Of course not. Prices are very low, so you will be in a better position than other people who joined earlier. You still have the time to consider what are your wishes and make a choice in which coin to invest your money.
It is never too late to invest in an immature market until the market becomes mature and this seems lightyears ahead from now...if it is too late for anything then regarding taking profits, this was indeed better a while ago.