It all depends on your financial capacity. Its a risk of money so probably we should invest what we can afford to loose. Sometimes its so inspiring to invest a lot and think of the possible returns we can get. But as we experienced it over the months and years wehad learn the possible downfalls. So better to think before we decide the investment we will put in.
I think many people are consumed with the hype of this 4 year event, if seen from history it always becomes a huge success. many people do not want to leave this opportunity, when else can we get an opportunity like 2017. I would say this year and next year might be a great investment for bitcoin, but don't be too greedy when putting money on investments, even 1 bitcoin is enough to make us rich and yeah always remember the saying invest with money you can afford to lose.