Interesting analysis, yes, this can happen, the crypto world is still so young, that all the scenario are open, in my opinion, the capacity of the block, also in a future as you depicted here, need a bit of expansion, 1Mb. block, also if you intend btc as gold, remains, in a worldwide adoption, to small, also if we can think at it only to cover big financial transactions, and not to buy a piece of bread on the local grocery.