Of course you cant buy 0.1 Bitcoin with 100 dollars today but you can buy 0.0025 Bitcoins with 100 dollars. I too came to know about Bitcoin in 2019/20 but that doesn't mean I am late to buy Bitcoin now. I created a table today that shows how effective it is to accumulate Bitcoin in DCA manner. Gathering Bitcoin is effective only if you are planning for long term investment. Do some calculations about Bitcoin DCA here and you will be amazed to see how effective still Bitcoin accumulation will be if done in right manner.