Im trying to word this right without sounding egotistical, but it needs to be said. When small wallet holders dump cheap to "make a few bucks", it hurts everyone in the coin, and it devistates those at the top that have risked thousands and thousands of dollars. Please if your just here to make a few bucks a day to suppliment your fixed income, please dump and be done, this coin is not for you. Im going to say this gently,"go in hard or GTFO".
Vegas
If you're at risk of being devastated by someone dumping the coin then you have probably over-extended yourself. Do you buy shares of stock in companies and then go plead for people not to sell shares on stock trading boards? Same thing. People invest in coins (and stocks) for various reasons and with various strategies. It's nice for you to hope everyone has a buy and hold strategy but the reality is that not all are on that page. Some are happy with a 20% return. There are probably plenty of people who picked up M coin for pennies and are now dumping for a 10x gain or more. This may be short-sighted in your opinion but they are locking in profits which is never bad. The market is what the market is, get used to it.