If you are not using quantum resistant addresses like segwit, there is a small chance your stack can be compromised by a scientific breakthrough. Here's how I see it. If your seed phrase is 12 words, think of it as a 48 digit PIN.(Like on a debit card) If your seed phrase is 24 words, think of it like a 96 digit PIN. Currently, quantum computing can "crack" a 2 digit PIN if it's under the number 30. The FUD exists because 2 digit PINs can be cracked. It is possible to create a Bitcoin wallet with 3 seed words, but you would need to be pretty dumb to do that. I guess if that's what your wallet looks like, you might want to change that, but it's pretty silly to pretend the sky is falling when quantum computing can't even break a 12 digit PIN, which nobody realistically uses anyway. Besides, debit card PINs banks issue are typically 4 -6 digits so why aren't the Quantum FUD dorks afraid of it breaking the legacy financial system?