I'd say dollar cost average with a smaller amount if you are convinced it is a bull market.
During a bear market, increase the amount.
As a rule, in a bull market, you need to trade bitcoin, increasing its amount and, accordingly, in a bear market, on the contrary, it is necessary to increase the number of stablecoins in the wallet. In this case, you will always have the opportunity, in case of a dump, to buy BTC at a lower price, thereby increasing its amount in the wallet.