How to resist urge to DCA-invest my life savings into BTC?

So, how to resist urge to invest my life savings into BTC, although via DCA-method? I would hodl BTC for 3-5 years and finally sell it for FIAT.

Rule number one of investing in BTC is "don't invest more than you can afford to lose" and I would definitely not want to lose the majority of my life savings.

Then, I feel that my time horizon is too short. Given the BTC's volatility and common recommendations of this subreddit, anything below ~10 years of hodling is a pure gamble.

Finally, BTC can tank to (near) zero and never recover.

EDIT: my goal is that I would like to *try* to build such wealth that some day I might be able to buy an apartment without taking a loan. This could be possible only with BTC.

EDIT2: mid 30s age, no kids, no rent, no dept, fluctuating income (freelancer)