The hard part with waiting for too long is the uncertainty that the price is going to reach your buy target. If the price  eventually reaches $5,000 and you though that the current price of $2,800 is too expensive, then you would have lost about $2,200 in profit because you didn’t jump onboard. But that is all if’s and but’s and we really don’t know if the price would still be bullish in the next few years or it would succumb to the bears and go down again below $2,000.