You are wrong @OP but bitcoin is already based on something that has a value and that is none other than fiat money or local currencies.
Bitcoin is based on fiat? That's a new one for me. I never heard no one say that before. If bitcoin is based on fiat then what's the use of bitcoin? who needs bitcoin if bitcoin is based on fiat? the only way bitcoin could be based on fiat is if satoshi would have made it a stablecoin but he didn't do that so... maybe you need to re-read the thread where people are talking about bitcoin being based on people's trust and belief in it as being "valuable" for whatever reason.
All the firms of Bitcoin he started from the fiat currency. The values of Bitcoin today that makes some people to organise what is meaning of cryptocurrency and the important of Bitcoin is from Fiat currency and without Fiat currency nobody come as well value Bitcoin because whatever thing they will be do with Bitcoin you must have change it with a value of Fiat before you can use it except the country you are accept cryptocurrency