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 ?
So far I didn't saw a single evidence that quantum computers can do any damage in real life.
They could be a problem in theory, but than everything will be hacked including banking and financial system.
Best thing you can do for bitcoin is to generate keys with strong entropy, and add encryption on your seed words backup.