With NFTs and Metaverse getting too much popularity and attention I don't think Deflationary Coins will get a fame in near future. If you have some spare cash and want to invest some part of it in BOOM then right now its price is ideal for buying. If you see historic price chart of BOOM, it has few spikes. If you buy it now you may be able to sell it in upcoming spike. DYOR before making any decision.
Yes that will a good approach and best if you are looking for long term investment. BOOM may not go up in coming days and your investment may hang up for a while there. But I dont think there is any loss in buying BOOM at current price. Rest DYOR before making any decision.