purpleinopp said: Hi & welcome! It looks like there are signs of life at the base?
purpleinopp said: That sounds promising. What do you think happened to it? Got too dry?
Or the opposite - was there a pool of water in the decorative pot? Got too cold?
If it just got too dry, I would moisten the soil well, put it in a sunny spot, and leave it alone otherwise for a few months (except to add water when dry.) Then you'll know for sure which parts are dead and you can trim those off.
If it's rotting from getting too wet, I would probably remove it from the pot as soon as practical, chop off the pancake of roots at the bottom of the root ball if one has formed, remove the rest of the soil. Then put it in a new, bigger pot with all new soil. When doing that, the soil level should be at the same point as it was before, don't bury more trunk. The day after doing this, I would water thoroughly, gently, so the force of gushing water doesn't compact the soil and/or wash it out of the pot.