Too late?

I've been getting a lot of questions from friends lately about whether they should invest a big sum now that the price is growing fast. But I honestly don’t know if that’s still a good ideay. What would you say, is it too late now and you should wait until it drops again or does it go even higher?

Update: I said to them: If you wanna trade, I can’t predict the future so idk. But if you wanna hold, then go all in.