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?
Hmm this is a tricky question but as someone who believes in long-term HODLing, 0.1 BTC MAY be enough for a person to buy something decent within 5-10 years from now. Imagine, the price of BTC back in 2017 was around $4,000 and no one expected its price to reach $54,000 after 4 years. Imagine the potential of having to wait two to three forks- its price may definitely skyrocket in the near future.
With every fork having to further divide its flow of supply, there is definitely that potential of 0.1 BTC being an insane value in the future. But if I were you, continue purchasing for long-term HODLing and you will reap its benefits in the future.