Even if Cardano has an huge potential as you said , I would still not make such a dramatic move, selling your whole profitolio just to buy a single coin is not a right move because if this coin goes down you will lose a large amount of your stash.

Make sure that you split your stash over several coins, so even if one of them goes down you won't stay away empty handed, always make risk management if you want to survive in the long run and to make money, especially if we talk here about the cryptocurrency market which is very risky.