Groups of pumps and dumps should be caught as this is a serious problem in the cryptocurrency. You don't take advantage of pure market movements, but you manipulate a whole market to your own will and bait people to join you in the rise. I wouldn't call it clever or creative, but rather illegal, depending on where you are. That's why I have never participated in those. It's pretty much stealing.
Every trader and investor is having some contribution in making market down or up so if you decide to change your bitcoin to Altcoins it will reduce the price of bitcoin. So we should try to keep the Bitcoin safe and instead of changing we should keep out bitcoin safe and try to increase the number of the coin in your portfolio.