Dude, wakeup, there is no TRB fork.
for want of a better term, there are two coins existing in the current core chain. legacy coins (trb/satoshi/whatever you want tot call them) and segwit coins. sooner or later there will be a split to separate legacy coins out.
It is absolutely nonsense! Why should anybody suggest such a two-in-one perception at all? Why not n-in-1?.
And why should such a split occur at all and how is it going to convince people, economic majority or even a noticeable economic minority about stealing funds from SW transactions by miners for the god sake?
right now the chain core is on and the chain that trb/satoshicoin/whatever is on are the same chain. splitting it out is trivial. being here since 2011 i have seen vast amounts of fud, greed, lies, power grabs, misdirection, you name it. the amount of forks is ridiculous and any fork that can enrich some group (even by a seemingly small amount at the time) is pretty much inevitable.
i am not telling you to use any particular chain, coin or address format. thats totally up to you. i do recommend you do your own research in such things. and never underestimate power or greed.
you have the freedom to use and store coins in any way or format you wish. as i and anyone else does.