Why do people start to invest when markets are high and pull out when markets have fallen? The Fear of Missing Out (FOMO) ....
Investment timing is impossible.
Invest fully, or stay out, or balance your portfolio to counteract market fluctuations or drip feed in or out.
Don't try and second guess markets.
'The time to be greedy is when others are fearful, the time to be fearful is when others are greedy.'