Historically in bull-markets $OBTC,$GBTC & miners outperform.
I don't have a crystal ball, but I'd guess in the next euphoric phase $OBTC will trade at a prem to NAV.
Miners may also outperform both, as they're considered leveraged plays.
Finally, you can always trade $BTC or $ETH futures, which offer margin & tax advantages.
However you roll, good luck!