There are hundreds of ways and methods to buy Bitcoin be it me or someone else.

For me there are several ways to buy Bitcoins and when do I buy them.
First: if I count the years I bought, what I remember is 2016 and until now, when I bought it, of course, when the price went down.
Second: (Dollar Cost Averaging) this kind of method has become a routine every month 3% of salary is invested, but not in Bitcoin part, what is certain is that another part of crypto that is cheaper and has appeal in the crypto market, you can say long term.
Third: the return on investment (DCA) of course I prioritize partly to buy Bitcoin.

That's my history about Bitcoin.