As far as I've read. I think you can. The majority rule is just to keep on wearing your signature until the ICO ends other than that, I guess you can join on any week. But ask the manager just to clarify things.
You're already wearing a signature, bruv. You can check the services in the marketplace at the bitcoin section. And for altcoin, check the bounties under the marketplace of the alt. currency.
Hi! I truly believe that no altcoin can beat the old man. Btc is running for a long time, hence it is the basis of all the digital currency, it is the most valued coin. It's superiority, popularity and the its value is the main reason why investors are kept on investing in btc.