About 2 weeks ago, the people who bought DOT at 10.5 USD were lucky investors. Currently DOT is at 20 USD and gives them almost 100% profit.
PolkaDot's potential is to be the blockchain of 100 blockchains, where assets can easily interact with each other, so the demand for DOT will be huge in the future.
A long-term investment in DOT during this time will bring extremely large returns.