Is it a good choice for the crypto things?
Safer than chrome, or firefox?
Its Chromium with a bat wallet addon, that's about it. So about as safe as Chrome is. They were trying to let people pay with bat automatically to others (ie. instead of watching ads). So its just Chrome with a couple of changes, and obviously you can use the same chrome add-ons (Yurickz is wrong).
Do not use the phrase "support the crypto users". Brave is only about the "basic attention token", nothing else, no Bitcoin or any other altcoin. And to complicate matters a bit, it does have a referral system, which causes it to be excessively spammed in some social media.