You probably already bought the "dip" at 120k and 115k (not that you would ever admit it). But feel free to buy the next "dip" at 110k 
I buy regularly - pretty much every week. Just little nibbles, using income coming in from other investments (stock and property). Have not looked, but I suspect yes, I made minute little nibbles at 115 and 120. I did have a larger standing buy order at 106K on Coinbase, but it didn't hit. (Which annoyed as the priced dipped to 104K on some other exchanges apparently).
When USD has falled to 1m per BTC (and IT WILL happen), the question will not so much be whether you bought at 110 or 115, or 120, but rather how much foresight you had acquire all the Sata you could back at that time...
I would urge you to get as much as you can into BTC, for as long as you can. If you want to dabble in ventures or protocols which are tokenized, consider ETH, BNB, FIL, LINK, UniSwap. But to be clear 90%+ put into BTC.