Just like the subject says, the more Bitcoin goes up this bull run, the most correction it will have, people who thinks this will go up without stopping are very naive.
This is not the time to buy, don't be a fool to buy at 50K.
And just a few days later bitcoin is up 10% since your comment, people that have been in this market for a long time do not have problems buying even now because they bought their coins at a cheaper price, so even if the price were to crash down their average buying price will still be below whatever level is reached when the price finally crashes, however I will admit that buying right now for the first time especially if you are a newbie is a risk and should be done with care if you do not want to lose money.