All in BTC strategy with diversification in the future

When BTC was above 100k, I only invested a little, while most of my money was in an all world ETF. Now that it dropped -50%, I sold my world ETF and bought bitcoin.
I had two strategies since over a year ago: Should BTC not drop much, I would go on with just DCAing it and leave my world ETF alone. Should it drop to levels I'm comfortable buying much (like -50%), I go all in. That happened. Now even if it would drop another 50%, I would buy more by dca and if it recovers to its ath, my initial investment would still 2x instead of just recovering.

Now I wanna rebuild a new world etf portfolio in the future, but first I will dca into btc only for the next 2 years. This dca'ed BTC is not like the btc I own mentioned above (dedicaded wallet), I will buy it on a broker and hold it there. Why? Because it automatically pays the capital gains taxes for you if you sell, and I can immediately use that money to buy other assets. I'll sell it in 3-4 years at the next bull phase and use the money to build a new world ETF.