SRGE shareholders who have come to realize that it is likely a scam should seek to recover as much of their principal as possible in selling the stock.
Pulling certs is essentially accepting the loss of all original principal plus the additional cost of pulling the cert. It is the antithesis of capital preservation! There is no rational reason to take such action and make one's shares unsellable.
SRGE shareholders should seek the advice of their brokers or other personally known and trusted professionals as to how to best recover as much of the capital they invested as possible.
Some anecdotal information...
With a stock as highly traded as SRGE, volume may be high for the first few days after opening on the grey market with day one likely being the highest volume. The first few days will offer the best liquidity. Typically, the longer one waits to sell, the greater the loss they will see. Even if the price seems to rebound after the initial dip, it is usually on decreasing volume meaning decreased liquidity. You may not be able to sell at or even near prices you see published for other trades. Waiting for a rebound may backfire.