prices are lower. Starting a dca say 100 usd a week for a year would be an okay move. Doing 100 usd a week for 2 years would be better. As long as you Just stack them and hold them.
Especially now, DCA is the most appropriate pattern to use. A decline can occur at any time and continue if we look at the BTC price chart, although it's not considered particularly necessary. But for me, it's quite helpful. Adding a small amount, even if I have good moment to get a really low price in the past two or five days.
Investing in Bitcoin requires a level of psychological skill in relation to risk management as the system is volatile it can fluctuate anytime. Everyone has their own choice, their own money, and their own level of risk they can handle so if you can't handle such level of volatility then investing in Bitcoin isn't for you.