Ethereum was dumped down to 950$ in latest Bear market and now it's trading 2x from that price. My question is , what is best price to buy ? Buy now or wait to down 600$?
That was a good price to buy

The probability of seeing Ethereum at $600 now has the same percentage as seeing bitcoin at $6,000. Theoretically it is possible, but in fact there is almost no chance, unless of course there is a critical failure in Ethereum blockchain after the transition to PoS. So it is possible to wait for such low prices indefinitely and in the end not to wait at all. I think a good range for buying Ethereum right now is $1000-1200.