[Edited out]
Therefore, he should invest five, ten, or 15% of that $100 in Bitcoin and keep the rest invested in local currency or gold as an emergency fund so that he can use it when needed
If I get you clearly, you are saying that we should keep our emergency funds in fiat or in gold, if that's the case I don't think it's a bad idea, especially when stored in fiat, the only problem keeping your emergency funds in fiat is that inflation reduces it value overtime, but keeping it in gold it's not adviceable in my own opinion because when you intend using the money for a serious emergency situation that threatens your bitcoin holdings, the value of gold might have drop drastically wish will be a major loss to you, and it will reduce the size of the emergency funds, so keeping your emergency funds in fiat is actually the best in my own opinion.