It seems like a lot of people might take some profit at 5,000. As we are currently around 4,500, that could be very soon if the price keeps on rising.
But I doubt there will be a lot of people taking money out of the system at that point. I mean people actually withdrawing funds from exchanges, in dollars.
If they simply keep the money in the account, ready for trading, any correction after 5,000 is likely to be only temporary.
But once the price gets to a level that is really making some people rich, then there could be some real profit taking, and then the potential for a more serious correction.