If quantum tech becomes the reality, I expect all technology to radically change.
Things will have to move and migrate with the times.
You say its not an issue for bitcoin? but you don't have any bitcoin! because I just got your key/login/whatever with my quantum computer and now its drained.
No I was referring to it that it's not a retroactive issue. BTC can implement Schorr signature or whatever its called which is quantum resistant.
At which point you just send your BTC to a new address and it's over.
Whereas in Monero if Monero will get upgraded to a QC resistant algo, you will send your money to a new address.
The problem however is that the entire blockchain up to that point will be deanonymized.
So Monero doesn't provide forward-anonymity.
Ok sure, but I'm pretty positive Monero is the only cryptocurrency project that have hired Ph.D mathematicians that are looking into that very thing you are worried about...
Unlike Dash who hired some random youtuber with tits to make videos/promote them. And I really don't mean for that to be read in a condocending tone, but hopefully you can see that there is just no reasonable comparison one could make about any other "cryptocurrency project" in relation to Monero except maybe Bitcoin.
Edit: this wasn't really directed at you personally... just wanted to get my thought out there about that subject.