My advice would just be the most responsible and safe approach to investing.
If you want to buy in then scale in, and that way you are mitigating any losses you will take from a continued market decline. This is also opportunistic as we are in a situation of large disruption to economies and have no insider information on policy reversal, so there's strong possibility of protracted market decline and so you may find a far cheaper point to buy in.
The opportunity was to sell before Trump's announcement, or immediately after it. Those are the times where 'Fear causing irrational decisions' is obvious. They think 'What if I sell and it doesn't crash?' that's ridiculous, of course it's going to crash. 'Timing the market' is mostly easy if you're not caught up in your feelings, and to deny this is itself 'fear leading to irrational decisions', such as to take an attitude of a powerless victim who is at the whims of the market and simply buys in - that is motivated by fear. The idea that you have no ability to predict and so you might as well put a large lump sum in now instead of doing the actual safe thing of scaling in is motivated by FOMO of a sudden large recovery.
The obvious and easy point to make money was when Trump was announcing his plan for enormous tariffs. If you have missed it then you have missed it. Now the most opportunistic thing is also the safest thing which is to hedge in more secure investments and scale in to the stock market according to recovery with some hesitancy. Significant risk you'll lose a little bit missing some of the recovery, higher likelihood of mitigating losses, and significant change of greater rewards of being able to buy at lower prices.
It sucks for retards who didn't sell, that was the easy opportunity and is now gone. But now is easy to be both cautious and opportunistic of slowly scaling back in. The irrational fear was not selling and now buying this relatively small dip.