Why not to invest in Bitcoin?
On the other hand, here are a few reasons why you may wish to stay away from bitcoin:
Despite bitcoin's massive rise in popularity over the past several years, it is not immune to design problems. For example, starting late last year bitcoin transaction speeds became very slow because of a scaling problem related to the way the bitcoin blockchain works. That issue did not end up creating the existential crisis for bitcoin, that some analysis predicted.
And the problem has now more or less been solved via something called segwit. Still, the bitcoin scaling issue was a reminder that a new type of serious problem may creep up in the future that undoes bitcoin.
Bitcoins by no means the only blockchain-based cryptocurrency out there. Another popular option is ethereum, and there are plenty of others. Bitcoin leads in cryptocurrency market share today. Probably because it was the first currency of its kind. But there's no guarantee that it will enjoy a market-leading position forever.
More people are now paying attention to bitcoin
Bitcoin's explosive growth in value over the past several months owes much to the fact that relatively few people owned bitcoin bofore this summer. Now, a lot more people are paying attention to and investing in bitcoin. The passing of worries about the deleterious effects of a bitcoin fork, and othere developments have drawn more attention to the currency.
What this means is that people who buy bitcoin today are not getting in on the ground floor. Bitcoin's growth may continue for a long time to come. But it will certainly not be at the incredible rates of this summer.