Sure; Bitcoin is a digital currency that you can trade with as low money as possible, it is not an asset that you have to buy one, you can be buying Bitcoin with as little amount as possible using DCA method so that you can maximize your Bitcoin savings not until you have huge money before you starts to buy your Bitcoin.
DCA method is the best method for people to bag Bitcoin.
In your first line of comment, you might be mistaken about bitcoin trading and bitcoin savings. That's, by the way, one can buy as small units of bitcoin as they can afford, but not all amounts are recommended to use and buy bitcoin due to exchange buy limit withdrawal limit and fee rate too.
The person doesn't also need to wait until they can afford a whole bitcoin before they can start with as little as $10 and above for those that will use a centralised exchange to start buying is enough for them to start with, and for whichever means that don't have a limit to any amount, which if you remove the withdrawal fee, you will still be left with something tangible that is worth it too.