Not sure if it has any affect on the cryptocurrency market but if anything it should help the market and hurt fiat currency.
In general, a similar scenario is quite possible. But only if one of the parties, for example China, wants to free its economy from dollar dependence by switching to its own currency only in another form of collateral.
For example, a fully digital currency. I am sure that it will not be Bitcoin, because Bitcoin is under the control of other people, to one degree or another.
China will not be so stupid as to assure its economy in such an ambiguous situation. Therefore, China is creating its own digital currency, national.
Probably China is considering a similar option of switching to a fully digital asset of its own production and is preparing the ground for this.
It is not known whether this scenario will be realized, but China is clearly expanding its capabilities in this regard. As for the trade war, this is not beneficial to either side.
Trade contributes to the expansion and growth of the economy, which means that war adversely affects the welfare of both countries. I don’t think the trade war will last long.