I hear that with BTC arbitrage, people make 20-25% per year.
What is the best way to do that?
The best way is not trading or arbitraging.
You can hold your bitcoins and see it helps you to gain massive ROI.
With 4 year or 7 year of holding, you will have very high ROI that gives you more than 20% or 25% gain each year.
https://casebitcoin.com/1 year ROI: +102%
2 year ROI: -2%
3 year ROI: +11%
4 year ROI: +379%
5 year ROI: +1,067%
6 year ROI: +275%
7 year ROI: +5,007%
Of course bitcoin is widely known to be the best for long-term investments however if some people already need the profit then there is no harm in finding other possible ways to gain money within the bitcoin ecosystem I think it could be possible to have different amounts of bitcoin for trading and bitcoin for long-term investments