You must be living under a rock then, because bitcoin just had a sizable correction last night. Sounds too volitile to protect any savings.
>also to send anonymous donations to causes I support.
Nope. The ledger is public and your transactions can be seen on it basically forever and, with some sleuthing of the ledger by interested parties, you could be deanonymized.
If you invested less than a month ago, you are down. If you invested any other time in the last 10 years than you are up. You might be the one under a rock.
As the old saying goes "Past performance is no guarantee of future results." Bitcoin could get legislated into oblivion causing a massive decrease in the value of your holdings (especially if world governments take climate change seriously, they may see Bitcoin mining as a major threat), a quantum computer could literally "break" into wallets and steal, Satoshi's wallet could suddenly move and expect billions of USD to be extracted out at once.
Too many variables here to suggest that your savings are secure. You're a braver man (or woman) than I would be.