It's a big No for me. It is never too late to invest in bitcoin especially now that its price was still at the bottom. This time is a great opportunity for us to buy bitcoin at lower price, which will in return can gain big profits if we sell it at higher price in the future. And for the bubble issue of bitcoin, I never expect it to happen because btc has a good store of value. Though how many times it dipped, bitcoin can still manage to recover.