6k not possible in May though I think with this recent crash of Elon!
It is better to invest when the price of etherium goes down but it is difficult to say how much it will go up this week. The price of Bitcoin has dropped a lot but for prices to go down traders will invest and hold on the market will rise again. There is nothing to be disappointed about going down but the currencies are going down for correction.
It is not always better to invest in a solid project when the price goes down,,, because one can never predict if the price will go down (but it does seem in our mind that it is always more likely to go down than up). What if the dip you are waiting for is lower than the new permanent support for the next rally?