I often see the sentiment that people will have to buy Bitcoin later if they don't now. Why do you believe this? What thing was mean a person finds themselves forced to buy bitcoin.

I really can't see a reason a person would ever need to buy bitcoin. Yet I see the idea that there will be a future where it is required. With fees what they are it is unlikely to ever be the only medium of exchange in any country, and no country has an interest in making that occur. So even if bitcoin would be more accepted for purchases it wouldn't be a requirement.