Barring an actual Tether shutdown, to me the charts are suggesting a lot more upside to come for BTC and ETH. If BTC makes a move higher, watch carefully for a rejection around 13-14k for a possible drop to 9-10k. For ETH, a potential rejection area is anywhere above around $360. A dip from around 400 to around 350, or lower, would be pretty normal for this market. These possible dips could be viewed as buying opportunities.
I think tethers are mostly responsible for the bullishness in the charts, but Tether use is showing no signs of slowing down. We have seen that provided that they aren't totally shutdown (as in their operations are fully seized by some enforcement action), then tethers are likely to be used to continue to pump the major crypto assets, even if there is more bad news surrounding Tether.
A possible approach could be to just hold some of the major coins from now on, and give up on trading until either Tether totally goes away, or we're much higher than here. Trade/hold at your own risk.