I was suspecting @CryptoPumper in the beginning with his loan offers.
But I tried to test it with a small amount I'm okay to lose.
So I have lent 5 BTC to him with 20% of return. I didn't expect he will return actually. This is a very popular scam scheme.
Today I see he posted an offer with 45% of return for up to 80 btc. So I decided not to wait and to disclose this fraud today.
I tried to get my 5 btc back by offering him new 20 btc loan. And here you can see the screenshots of his messages.
I haven't got my 5 btc back but I'm not concerned with it.
I'm also observing @CryptoJack and @Altcoinpumper are offering the same suspicious loans. Be careful!
And be aware: Never lend money in twitter. In 90% this will be a fraud offer. So even you managed to get your money back it probably means that the scammer is just feeding you as a fish before the fishing.
And what to do if you have already lent money:
1) Don't hope they will return your money back. They will tell you many things: I'll return your money in 48 hours, I was scammed by someone else, …
2) If you are from US, EU, or Australia, contact police
3) if you are from Asia, former USSR countries, file the complaint here: https://www.ic3.gov/about/default.aspx
Remember that Germany recognizes Bitcoin as a currency and US court has also created precedent about that. PirateAt40 is going to jail now as he's taken real money.
I don't think they are so professional to maintain the anonymity in the internet. 99% they have kept some trails.
@RSGeeko reported his IP address. It appears to be 24.186.34.19 Optimum Online New York Mineola
And the latest update from @RSGeeko is that @CryptoJack actually controls @Altcoinpumper and @CryptoPumper account.
Find the screenshots proving the scam bellow.
cryptorally 
Hey cryptorally, I need to talk to you ASAP concerning this matter. Is there anyway I can contact you, can you give me your email or is there a DM system on live journal?
Yes, you can send me a DM here. Or you can ping me it twitter, I will follow you so you can send me a DM.
Yes, I sent you a DM here, please check it out ASAP
I cant’ reply you. You have enabled the privacy options for their messages.
How do you suppose I change that? I think I changed it, maybe you should try again
Check your privacy settings in your user profile.
In any case, don’t put much time convincing me, don’t think I will trust you more than I trust my own eyes.
You don’t need to trust me. Just look at the facts, you’re eyes should see the irony of it all, look at the old altcoinpumpers loan offers, none of then totaled over 30% interest and the normal offers were 10, 20 and 25%.
How could someone suddenly offer 45% for three accounts at the same time.
Coincidence? I don’t think so
And be aware IP of @CryptoJack is already known. @Altcoinpumper IP will be known soon.
Im already aware of all that, I told you im an insider in all of this. I spoke to those involved already. How will you get altcoinpumpers IP? He changed his twitter name and handle
We’ve got your IP 🙂 So now we have IPs of all the participants. And just in case you delete everything I’ve saved your comments: http://i.imgur.com/9Cr8vb4.png