Obviously, this will be a low rate, but I have seen some say that as low as 1BC=$13.5k, is this plausible?
Yes, it's plausible. If you can get this price, consider yourself as lucky due to current price tend to increase, over $16,000 at the moment. Bitcoin fall to $12,980 in December, 31st and around $13,363 in January 3rd (
https://coinmarketcap.com/currencies/bitcoin/#charts). I'm not sure if you can get the same price in the nearly future, maybe after few weeks when bitcoin get corrected again, it will fall to around $13,000 for sure.
Well if I think it's
almost impossible to happen. You have to wait for a big hardfork in the future so that it can happen. And nobody knows about it, whether it can happen or not. So I can only advise you not to wait that but buy and collect cryptocurrency as much as you can. Do not wait for a
price reduction like the newbie and the uninitiated. Many people who want to take advantage of their little capital to do it, including me first. But now I realize and must collect Bitcoin as soon as possible and as much as possible. Do not lose profit that you can get, just because you wait for
something uncertain.