Even if it were the release, there is a lot of cash that needs somewhere to go right now. The market has volatility without the returns, whereas you can get nX yield for the same perceived risk in venture funds. This could be a very good time to be in VC or doing a startup.
Liquid capital needs productive assets, and fed-backed crazy town might not be the place for it.
Hashicorp also has awesome and sticky products, and they have earned whatever they got. With Vault, they got people to adopt their defacto HSM, without the friction of selling hardware, and all the benefits of being the root of trust in each enterprise. Everything about that company is f'ing brilliant, imo.