Long CVNA short NIO

This is my first idea.
NIO is overprice and the whole tech sector (and especially the EV sector) is in a bubble, so I would like to short NIO.
On the other hand, what if this bubble will last many more months?
So let's long CVNA (that should be able to sell used Tesla or any other EV car as well and will do well even if the whole market shifts to only EVs).
From the TA point of view, we are in accumulation after braking the trend.
Tell me what do you think.
This idea is for entertament purposes only. Do your owen research.
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