Previously, I thought investing in BTC was only for whales and that small investors like myself wouldn't see significant gains.
You actually lost a lot for that, Bitcoin investment is not only for whales but normal or small investors like you and I can make great profits and gains too by buying small small and holding it.
This misconception cost you lost profits.
However, yesterday I saw a tweet from someone who invested $500 in BTC when it was at $82,000 and now their investment is worth $3,000!
Your math is "
strange", though.
How can $500 turn into $3000 if bitcoin only went up by $5000 (from $82k to $87k)?
I guess that person invested much earlier than the $82k level.
I felt regretful for not investing earlier and wished I had converted my money to BTC.
If people around you start having similar thoughts, then it’s time to quickly sell your bitcoins.

Now, I'm considering a new strategy: if BTC's price drops a bit, I'll invest the money I have and convert it to BTC.
Please share your honest thoughts - is this a good idea or not?
When the price drops - you will not want to buy. I mean, strong price rollbacks are unlikely, because bitcoin is on an uptrend. Either buy now, or wait for a bear market (but you will have to wait a long time).
You are making a typical
BTC-hamster mistake: you should have bought it when bitcoin "
wasn't needed by anyone". For example, half a year (a couple of months) ago. Now you will buy with a huge anti-discount. But even with this scenario, there are still chances for short-term profit.