This is the key argument for people promoting Bitcoin: Look how where we were a few months ago and look where we are now. It is only going faster - you should join.
This people are hyped up so they are sharing the good impact to what the Bitcoin things already done in the past up to now and I don't see anything bad about it, promoting it will not gain them any referral bonus though.
This means that these people have jumped out of an airplane with no parachute.
Investing money in any kind of things are always risky and with no assurance at all so it is normal to say that, if there is please share it.
They are now halfway down and are telling their friends: Look how well this is working, and it is going faster and faster.
That's the way it is, the momentum is with Bitcoin right now and no matter what we said about the next event that will occur it will still decide's its price.
When you tell the people they are going to crash-land, they just tell you it is FUD and that in their experience things have been going great since they jumped out of the airplane.
Thinking positive to the things that you invested is a must but fooling someone else is bad so it's your choice to be gullible with those FUD.