Not alot can be said that could settle the nerves of investors...

Not alot can be said that could settle the nerves of investors here or on any other stock - drops are across the board at the moment and if you've been in this market long enough you'd experience a few in your investing lifetime but you're also aware they pickup again later if the company is well funded and run.
Corrections are part of market cycles and some will hold their positions and some will try and time their exit and get out early, but if you wanted out and you've left it late, sometimes it's better to hold tight and ride it out if you accept the risk and your in a well funded company. Archer most likely won't need cash for at least another 2 years ( you can check their last quarterly) and by then not only would they have advanced further and likely more partners but also this correction would likely have sorted itself out.

My opinion is the US Feds are going hard and fast with the 3/4 percent rise and hopefully this can go someway to tackling inflation quicker than a small rise in rates and dragging it on. These rises will be painful for all of us with mortgages and hopefully many have allowed extra funds in case of this eventuating.

It is what it is and you have to do what's right for you. Don't lose more than you can afford to lose - there will always be opportunities later if you have cash - but you limit yourself if you don't! Many like myself will weight the long-term risk/reward and see this as a buying opportunity or simply hold.

What makes these corrections worse is panic because the market is falling and some companies can be oversold but this is where opportunities can be thrown up in the process.
These corrections won't last forever, but I hope everyone here makes the best decision for their timeline.

Wishing you all the best in these turbulent times.
Tonza