There are two things that I need to know before I'll pay for a ticket again:
1) If my flight is cancelled then will I get my money back within a reasonable timeframe (not credits, no six month delays etc);
2) Will my travel insurance cover any costs (including flights) if there is a flare up of Covid-19 that means that my travel has to be cancelled.
Unless these happen then I won't be travelling until I'm certain that either case is highly unlikely.