But im thinking.... why not creating a bitcoin fork to include all orphaned coinbase tx since genesis block up to this date?
The code is open source. You can do that and recover the 50, but I doubt that it will have a value, or at least equal to 0.1 Bitcoin.
If you broadcast that transaction at that time and received Bitcoin at your address, then you could access your money, but the work was not done, and in Bitcoin there was either a return obtained or someone else obtained it.