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Thank you for your suggestion! The thing is last year Google has blocked all advertisers who ran cryptocurrency/ico-related ads (and us too), so we have no opportunity to run PPC ads for our brand name. Luckily, no competitors run 'bad' ads targeting our brand name as well. 
I guess it's really the 2nd option that's realistic for us - to push the first query-space to look cleaner. Again thanks for your helpful ideas!

Hi everyone!

I have my tough question, hope you'll help with your recommendations!

I have a domain for blockchain company (DA 38, 590 linking domains), which started as an ICO project, but rapidly grew to  a recognized  B2B company with a few B2B clients. What we want is to attract more B2B prospects via Google Search, but the problem is when our prospects google our brand name (which also happens to be our domain, so this domain must be kept) they see mainly ico/crypto SERPs (as the result of ICO ad campaigns, online publicity etc). And they get prejudice towards us and don't trust us in the first place. What we already managed to do is to add some B2B news and links in 1-10 SERPs for our brand name, but still old ones (crypto related don't go so fast). Our management wants  our prospects to be able to clearly see the difference between the current company domain (which must be remade to B2B focus only) and the new domain (our token-oriented, since our product is on blockchain). Question: is it possible to do such differentiation in the eyes of Google (and thus our prospects)? if yes, what is the best way to do that? 2 separate domains, not linking to each other or any other way?
Do you have any other ideas?