Convertibility to fiat is kind of a low priority for a store of value. Auditability, barriers to rehypothication, and ability to self custody are probably much more important for a store of value.
So being a better store of value than gold isn't hard.
Housing is sometimes a store of value. Bitcoin is probably more liquid, and way less of a hassle than some housing. Expect some of that to move over.
Fine art is primarily a store of value. A lot of it sits in airport warehouses. Bitcoin is just as scarce, but much more convenient.
Stocks are certainly being used as stores of value for many people. At some point, Bitcoin will become more reliable than index funds.
Idk much about bonds, but I'm sure some of that will flow to Bitcoin, as bonds become a less attractive investment.
If people can't sell isn't that positive for the price? The whole 'hodl' thing is to stop people cashing out. Since crypto has no inherent value, the price is reliant on more people cashing in than out.