AGI is becoming so sophisticated that it cracks the Bitcoin algorithm=> AGI is not a quantum computer that can break encryption. However, it may assist in the development of a quantum computer that could break Bitcoin.

If AGI were to occur, it could cause massive deflation. some investments that perform well in deflation: cash, give government bonds,corporate bonds and precious metals.

Crypto will become irrelevant, fiats too

So what wouldn't?

I have my doubts on the value of Crypto, but owning assets is indeed getting more important as we approach AGI / Singularity. AGI will cause technological unemployment and is thus highly deflationary. In that case it is actually preferable to hold assets that will appreciate in a deflationary environment e.g. bonds, dividend stocks, money market funds, CDs (certificate of deposit, not the one you can by in record stores!), even cash (cash appreciates during deflation).

Crypto was intended as a scam in the first place. Sorry man.

You don't have to develop quantum computers to crack encryption. You need quantum computers to brute force it but it's entirely possible that an algorithm could be developed that runs on regular computers that's able to solve encryption.