You can use DCA accumulation strategy to buy bitcoin every week regularly with part of your discretionary income for 4-10 years and above as a long-term hodler so that you don't miss out forever from benefiting from the opportunity bitcoin is giving to us now that the price is not up to $100k yet, because we still have a whole lot of circles to come and bitcoin price has the high odd of increasing overtime, so that you don't regret your actions in future.
Or every month, or every 2 months, as long as you spread it consistently, honestly even every year buying, even if you buy at ATH, in 4 years that pays off, and the other years pay off more.
It is too late to make 100X, I do believe this, but it is never ever too late to reduce your risk of inflation with normal currency, and increase your chances of making so much more value by saving in BTC.