As soon as the mining dumpers that have to pay for electricity are out of the system the investors can take over. A high network mining hash rate is not important because you can have the same block rate with 1 CPU at low difficulty vs a gazillion quintillion terra has rate at super high difficulty. What is important is to gave the coin in the hands of many investors.  There must be an average hash rate for mining but many exchanges with high volumes of trading for the coin so that there can be liquidity.  The highest risk of a new coin are many miners mining for profit because miners are the dumpers on small exchanges with low volumes causing the value of coins to be low.  Investors know how to work a market so that there is not high volatility and investors know better than to just dump. A new coin must just get through the first few weeks without being killed by profit mining dumpers and Bob's your uncle.