1- Ethereum
Can be less than $500 if a huge dump takes place in btc and eth both during this bull run.
2 -XRP
SEC has already killed the credibility of xrp in the eyes of everyone, so it is already dead for me and can be worth 0 even tomorrow if a new claim by SEC shows up.
3- DOT
I do not think this will drop much as it is providing a service and holding high price as a medium and if this will fall, all its sub projects will also suffer so for this, my prediction will be worst - $2. A drop is possible seeing pancakeswap having a duplicate website attack recently.