Hi guys, any 1 or 2 words that explain bitcoin.

Im doing an article about bitcoin. i was wondering if theres a 1 word that explain bircoin.
Thanks.
it would be a really hard thing to do as bitcoin is a really complex mechanism and it is nearly impossible to explain it in 2 words
i think i would choose, decentralized and free, as it is not in power of governments and the fees are really small to send it anywhere