First question I ask them is, do you have money that you can afford to hold for some years? Bitcoin investment is about patients and capital, although you can invest a little amount into Bitcoin but it will only give you a little profit but if you have a large capital and you invest it into Bitcoin, you will surely get some good profit during bull season.

You likely will not make profit if you can not hold for a long time (being patient) and you can not also make good profit when you only put it a small amount. If you don't have enough money to invest at once, you can still use the DCA (dollar cost average) to accumulate some Bitcoin gradually.