Check the article here
https://cointelegraph.com/news/is-it-too-late-to-start-investing-in-bitcoins
I don't think so. It is only just the beginning. Bitcoin is like gold at the moment and it's good to diversify your portfolio into Altcoins. Only invest what you are willing to lose.
My top 3 coins to invest that I reckon that are safe are:
- Bitcoin
- Ethereum
- Steem
Do your own research and keep investing in Steem!