GBTC will move almost identically to bitcoin, it's an ETF from Grayscale Funds that tracks, you guessed it, bitcoin. JP Morgan just gave bitcoin a possible price target of $146,000. Tim Lee from Fundstrat, a very reputable analyst, gave it a $100,000 price target.
If you can't buy crypto directly in your trading account or retirement account, you can get exposure to the bitcoin boom through this avenue. Go long GBTC because it will follow right along with the actual bitcoin crypto and is a great way to get exposure.
This will also act as an inflation hedge.