I know to waiting for the bubble to burst is wiser for better profits but if it is not a bubble? People wait for the bubble to burst but may wait until there is no chance.
Just like the people who said bitcoin was a bubble when it reached 1000 early this year and did not invest. Then 2K, they thought it is still a bubble and blow their chance for 400% profit.
8K is already high, but I think bitcoin has still a lot of room to grow in terms of price. It may have a correction but we cannot tell for certain it will happen. I say buy now, if it corrects, hold and buy more. If it surge farther up, enjoy the profit.