I think I will sell everything I have (btc and alts) in the end of december, to USDT.
How can you be sure if the next year could be the bearish year? is it only your assumption or what? I guess that's your choice but is not it better if you keep some percent to prepare if the bullish trend will continue? none can predict the future of market.
1) transfer it (usdt) on Tron on my ledger
2) Wait months
3) Wait again
4) buy back when bloodbath looks over
5) triple my holdings
Im not sure if that will be working or not. The possible thing if you would be missing the train and you have no choice rather than buy it at higher price
Main question about my plan is it safe or not to keep usdt for months?
For me it's safe to hodl USDT for months. I have been keeping my USDT for years and nothing happened to me. If you're feeling worried to use USDT and you can replace it with another stable coin. We have so many stable coins these days and i think that you may be interested to use DAI or BUSD. People are aware if USDT can freeze our money but remember that it's only a few cases and people are still actively trading USDT in the market. that proves if USDT is still safe.