Considering the supply vs global population = 0.003BTC per person to go around.
Then other factors like not all 21 million will be in circulation due to lost wallets/deceased hodlers who never informed anyone where their seed is, and also an increasing global population and future generations who all want in.
Do you think 0.1BTC will be like owning a mansion?
I kind of think that there will be a time when bitcoin will be scarce, because there wouldn’t be much to go round. And since it is limited, it’s going to be rare and sold for a really high price that most people might not be able to afford. So, when a time like that comes when bitcoin is going to be rare, owning even a half of that 0.1 BTC is going to be a lot of money, and a lot of people will even find it difficult to sell the coins they own, unless they have a better plan of what they would do with that money. Another thing is that as time goes on more coins are likely going to get missing, which will further decrease the number of coins that are available in the market.