Haha... I just check it out and apparently the discord link you shared is a referral link for the discord group which puts you up in rank and thus you receive the pump signal earlier... so much for helping. sigh

They are not supposed to replace bitcoin...
Bitcoin is just THE cryptocurrency, whose only use is to store value similarly to gold.

Now, the initial purpose of bitcoin, a fast decentralized way to send money, is fulfilled much better by other coins (LTC, DASH).
Essentially every coin is technologically better than bitcoin, but they aren't bitcoin...
So for long term investment, if that is all you want, bitcoin is probably still the bet decision.
Just remember that due to its essentially useless nature, it is always possible it may just crash.

Is IOTA still a good investment, now that it is above, or hovering at around 5.00$ ?
It seems that if it rises it won't go much more than 10$ considering its market cap...