The simple answer is Yes, it is Halal in major. However, certain crypto projects are developed for purposes not endorsed or are in conflict with Islamic principles and trading them is disliked and sometimes, Haram (prohibited). Therefore, one must always read about the project in detail before investing in that because investing in a project means being a part of it in the sight of Islam.
We won’t stop here, we will take it further for the better understanding of readers!
There are a number of opinions on the subject available all across the globe inviting a lot of conjecture. We will try to clarify it once for good:
Who can issue a Fatwa on the subject?
Only an expert who understands every dimension of conventional centralized and unconventional decentralized financing. It is not only someone known as a Mufti to be qualified to issue a fatwa on something he doesn’t possess in depth knowledge of.
KGS has studied more than 100 opinions of various scholars from across the world and has found the Fatwa by Mufti Abu Bakr, a renowned expert on banking and finance who has compiled his fatwa from over a dozen references by some of the most respected scholars and Dar-ul-Ifta.
He holds blockchain technology to be a boon to Islamic society for its transparency and security to record and manage ledgers. He considered crypto currencies Halal and some with a doubtful nature, disliked to be traded.
His research with opinion and citation of references can be found on Islamic Banker files:
KOHENOOR 
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