As BTC, Fiat and Gold all three have both pros and cons. which one is better for multiplication of money in present circumstances and where risk is found.
If you have taken the time to research and know the pros and cons of these three types of assets, I think you also know which type of asset can meet your needs.
Obviously bitcoin is the answer to your question and we are on the bitcoin forum so there will be no other answer than bitcoin. I just want to remind you that the higher the return , the greater the risk , no asset can bring higher return and be safer than other stable assets . To put it bluntly , Bitcoin is the most profitable asset of the three but considering its volatility and many other factors, it is considered the riskiest asset . Therefore , you should also consider the risks you may encounter .