In my opinion, when you enter is not as important as how long you stay in the market. I mean, many people know bitcoin very early and also invest in it, but they don't have the patience to hold and sell them early and leave the market. Those people also don't get big returns as many people think, while those who invest later but they persevere, have faith in the market and hold for a long time still get better returns. Bitcoin is a long-term investment, those who stay in the end are the winners. Patience is key when investing in bitcoin.