I was reading a news article saying that bitcoins will not be safe once we have powerful quantum computers. Is there a good alternative way to store bitcoins safely in such a situation ?
Quantum computers are years away of doing this. Go and ask AI and it will not even attempt to solve a Bitcoin private key because they know it’s highly unlikely.
You also need to understand that the first target of a quantum computing against a Bitcoin address won’t be a small user. There are bitcoins with billions of coins and those are going to be targeted first.