So the pound being strong is definitely a thing, but it matters differently depending on your situation. if you're planning a uk trip soon, stronger pound = your money goes less far over there, which kinda sucks. but here's the thing - trying to time currency movements is basically gambling. like yeah the pound is up now, but nobody actually knows if it'll keep going or drop tomorrow. moving all your savings into pounds betting on this is risky unless you genuinely need pounds (like you're moving there or have upcoming expenses in gbp).
if you've got savings in another currency and you're worried, just think about what you actually need. are you spending money in pounds in the next year or two? then maybe converting some makes sense just for peace of mind and to lock in what you can spend. but don't move your whole portfolio around chasing exchange rates - that's how people lose money. if your savings are in usd or eur or whatever and you're not going anywhere soon, honestly just leave it. currency swings happen constantly and evening out over time.
for travel specifically, it sucks right now but prices in the uk are relatively lower than you'd expect anyway. you might just end up spending a bit more or adjusting your trip slightly. unless you can predict the future (spoiler: you can't), the timing game isn't really worth the stress.