This can be re-phrased as a long-term vs short-term question.
BSV and BCH are bitcoin forks with a limited (if any) use case. They have to be seen as short-term coins only. Their volatility (extreme volatility once Craig Wright gets involved) make them good trading coins. That is all.
Etherum is the pre-eminent smart contract platform with a hugely impressive history and solid roadmap, as well as undeniable use case that could have a big transformative effect on society as a whole. Smart contracts are a winner, the only question is will ETH remain the best smart contract coin? (I think yes, but I'll concede the question can't be settled yet.)
Speculation is always short term, for me,,, mid term even is not predictable with the way altcoin projects go. You never know except for the big ones which ones will stay longer after they made their profit.
BSV and BCH have not only limited use case (like you I think not even) and their founders as everyone can see are not even developers properly. I cannot ever suggest them except for pump and dump but if you play that game,,,