Trustlessness agree, but also simply complete and perfect reliability for anyone. I don't know how to word this but if you live in a country like me with so many restrictions, you have zero ways of sending or receiving money that not only doesn't require you to trust but that promises you the transaction will never be cancelled or changed or whatever. That is a real problem in many parts of the world! Bitcoin instantly solved that real problem.
No surveillance, no politics, no restrictions, no rules except network rules.
The ironic thing is most alts with those 'USP' of faster/cheaper txs added the rules, made KYC as surveillance, created politics, and the restrictions damn. USDT can't be used in this country, XMR can't be used on that exchange, etc etc etc
Then in the end their value is pure speculation. Nobody using them for actually sending and receiving money.
BTC has put a full stop to chargeback scams. I faced this situation, bro, it was not legal in my country too, we had so many restrictions too, we didn't even have PayPal and still don't have it, so you can imagine how hard it can get many times for getting payments or sending them.
BTC made everything easy, once the TX is done, there is no way the other party can reverse it and try to scam you. People first had to find someone to use their PayPal, then they had to face refund scams too, but BTC has saved us all.
I use BTC for sending and receiving money, people on this forum use it, so there is a community, which is Bitcointalk, and people here use BTC to send and receive money, even for remittances.