We can go into the realm of total impossibility and assume that a coin
will be worth one thousandth of one cent in five years. This would mean a market cap
of two Billion dollars. Nothing to sneeze at

In 5 years likely much less if not 0. But assuming it is that why focus on the market cap where GAW controls 97% of all coins and growing? why not take an average investment from a victim and do the calculation?
Lets say that you have a large investment of 10k paycoins2 ... your investment is worth nothing in the future!