good points specially the second one. i always tell people to stick to only a small number of coins and unfortunately i keep seeing people with long lists of coins they have invested in for some weird reason! i have actually seen someone who held about 50 different coins and tokens and was waiting to become rich but in reality he was losing more money that one normally does.
about your #4 i have to say i don't like telling others what i have invested in, specially friends who have no idea what cryptocurrencies or investment is! sure if someone is already familiar with the market, tell them but not if they are not.
the idea of #4 was: more people should be involved in this phenomen. Theirs new money put "in" are called at the end higher "MARKET CAP".