The most valuable thing is time. The second most valuable thing is Bitcoin. I disagree with those who say they'll never sell Bitcoin. Selling Bitcoin is worth it if it allows a person to spend more of their time as they choose to.
Discussion
There is a difference between selling Bitcoin and spending it.
I will NEVER sell #BTC.
It's not required. I make enough to spend my melting fiat. When goods and services are offered in #Bitcoin I'll splurge.
I zap frequent and I sell never.