No. If we assume bitcoin will hit $1 million (which is pretty generous), then 0.1 BTC will be only $100,000. If bitcoin hits $5 million, then it will be worth $500,000. With potentially very high inflation in future years, this may not be as great as it sounds today. However, owning any kind of bitcoin is probably better than holding cash.
If we will going to make the present time especially today a reference as owning 0.1btc for me is enough, it is enough already to claim myself as a millionaire in terms of conversion into our fiat currency however this amount will not going to be a good own if future purposes will consider. Inflation kicks higher every year and that's what will going to kill the possible value of our owned 0.1 bitcoin if in case. But yeah, owning a 0.1bitcoin is already good enough than holding cash