Also I heard that super computers can get through all crypto wallet keys easily in a matter of days, true or false?
that's a false rumour. Super computer already exist and why crypto is still alive? there are lots of reasons to explain this thing but this will take a week to debate about this. You can read a thread that already made by someone in the past like this
https://bitcointalk.org/index.php?topic=5157696.0 that's very well explained that if quantum computing aka super computer was not a thread for crypto nor bitcoin. You just mis understand about that.