I think the bounty usually depends on the number of participants, your rank, and your hard work. If you work hard, you can still earn a reward for your bounty.
Now i'm joining bounty of Pavo. This is a highly feasible project and can be widely applied in practice. You can refer to their whitepaper on pavocoin.com
I think the majority of altcoin is scam, but not all. For the potential coin, and the project is highly feasible, why do you have to sell coin when it can be profitable for you?
The reason why it goes down during the weekends is due to the fact that many people are free during the weekends and added on to that the traditional markets are also closed and now its time for the traders to come in to play , im pretty sure bitcoin doesnt always go down on weekends but it usually does , but sometimes it goes to the upside as well as during weekends cryptos in general see a higher vlume
I think with new people and those who have little capital, they will only keep for a short time and when the profits they will sell to recover the capital. But want to make bigger profits you have to keep it for a longer time.