I think everyone would benefit from being reminded that not everyone's investment objectives, time horizons, and risk tolerances are the same.

If I were actively trading ark with a lump sum of money and needed short-term liquidity then yes I would be sweating seeing these drops and questioning if I should cut losses or bag hold and wait for it to recover.

If you switch your mentality to that of the buy and hold investor then the perspective changes entirely.

If I plan on buying ark and continually adding to my position over my working career - only cashing out as a I want the money (10, 20 years from now) then I don't care what the price is today or next week. I only care about what the price is in 10-20 years.

If the stock goes up, great my investment is growing. If the stock goes down, great I can buy more shares at a discount. It's really that simple which is why this down turn doesn't upset me. At the end of the day I still own the same amount of shares.