"Just give me a few minutes to upload my XCoins from my XWallet to XY-Exchange, convert them to YCoins, and a few more minutes to transfer my YCoins to my YWallet".
Either that or you keep all your coins sitting in said exchange so you can instantaneously convert them and pay out. And then lose them all permanently when the exchange has a security flaw.
I provided the convenient option. It's just that it leaves your funds massively exposed. The relatively lengthy transaction times built into *-coin transfers are going to make most conversions 'clumsy'. What alternative would you recommend?
One possible option that required 10 seconds of thought to come up with- multicoin wallets on both ends of the transaction.
Why can't people (on this site of all places) spend just a little bit of time thinking about how things could work well instead of merely pointing out problems?
Either that or you keep all your coins sitting in said exchange so you can instantaneously convert them and pay out. And then lose them all permanently when the exchange has a security flaw.
Currency of the future.