Think about when bitcoin can't product more coins and miners have not gotten any income from the their mining activities. Imagine when this thing will be happening and miners can only get the reward from the network as they will be working to confirm the tx to get the fees as their reward.

That makes bitcoin will be so difficult to be dumped. This time miners are always sending their bitcoin to cover their operational cost.
The supply cap of bitcoin will have achieved 100 years later and just imagine so many updates that will be happened to the ethereum. that makes sense to think the price of ethere will worth more than 2k or even 10k maybe