It is normal such falls have already happened several times. Only the amounts were smaller. But the percentage was similar. There's nothing to worry about. This is a good time to buy BTC.
True, bitcoin prices up and down is a natural thing. Although down but the rate is still higher than the lowest price last year. Nothing to worry about, keep calm and buy some bitcoin.
You are right about there is no reason to worry but I think the reason of the recent fall is manipulation and panic selling. a lot of retail trader is in fear and most of them are selling in panic.