The Bitcoin supply will be completed soon.
Not to soon, it's more than 100 years before it will finally reach the total supply limit.
So, can we get more profit by buying Bitcoin or Ethereum?
Bitcoin but I'd like to have both of it, they're both profitable.
What do you think will be the value of Ethereum when the Bitcoin supply is complete?
Don't think of it, we're not alive by that time anymore. Think of the box from 5-10 years or even 20 years.