It's amusing that grin is going to out-cash BCH, using real science instead of dumb parameter fiddling. grin can scale costlessly, and it's also reasonably private like physical cash.

In the far future, I see either a BTC-only ecosystem using various off-chain systems to scale (maybe a grin sidechain), or BTC as digital gold and grin as cash. But there's really no place for BCH's strictly inferior tech.