The phrase "institution-grade" have the strongest meaning in commercial real estate, where they tend to be brand new buildings without any real risk of falling apart during your holding period. They are lower-risk assets. On the other hand, if you're talking about something bonds, you're more likely to hear about "investment-grade" bonds to describe the lower-risk investments. In other words, the exact opposite of Bitcoin, easily one the most volatile assets on the market. (If you want any more volatility, you need to start trading derivatives.)

A few billion in speculative investments doesn't make this "institutional" in a hundreds-of-trillion-dollar market, either.