https://qz.com/1138471/the-bitcoin-price-btc-is-nearing-10000-as-it-rapidly-breaks-through-symbolic-barriers/

If it seems like bitcoin is hitting new highs more frequently, it’s not just your imagination. The cryptocurrency is smashing through psychological barriers—that is, big round numbers—with increasing frequency.

In part, this is simple math: The jump from $1,000 to $2,000 is much steeper, in percentage terms, than from $8,000 to $9,000. Still, as bitcoin surpasses each new symbolic level it generates more attention, potentially attracting more buyers who want to get in on the action.