Here is the answer:
When a junk stock runs up, the existing investors take advantage, and dump their shares. Who is buying? Daytraders who can not and will not hold on to the stock. When rally runs out of fuel, daytraders start dumping, and since there is no more buyers, price goes down and down and down until the old investors become interested again to acumulate at depressed price, and wait for the next rally.
Got it? Be smart in the future, and good luck.
As far as RNIN goes, I think is headed for $0.75.