To get these returns, BTC would have to appreciate 100x in value and you would still need those 200k$. While it has done this before, past returns are no guarantee of future returns.
If you want to finance the 200k$ with debts... well... the percentage can kill you, or require you to or in a sizable chunk of income to pay it off. (Mortgages in some cheaper places in US are this size. )
Agree in totality. This is the same concept as buying South African Rand because the value moved significantly in the past year or two with respect to your current. These aren't assets, these are mediums of exchange. Plus, in a world where all we use is Bitcoin, the price change with respect to dollars becomes irrelevant.