Can I invest $100 in Bitcoin?

course you can , however if you want to make a buck you need to invest a lot more
this move will not make you rich

You can start investing with $1 in your pocket

Yep, It's steadily going up. Hopefully to 100k soon.

Shure you can, dont listen to the haters. $100 is a good amount for a beginner. Dont expect 2x gains though. Expect 20% to 30% gains.

If you expect 5 to 7x gain in a short time, you should invest in decentralized exchange tokens like 1INCH, UNI, CAKE, BAKE, etc. As for Bitcoin, it is impossible to predict at what price it will be, at least within the next 10 years it will still have a high value.