How to validate cryptocurrency business idea? entrepreneur how earn by blogging blog

I'd like to create a sentiment analysis platform, similar to sentdex but more geared towards cryptocurrencies.

How could I validate this idea? I'd rather not spend the money in a new domain for this, so is there any way I can get user emails without a landing page?

Or even if I had a landing page, how would I direct users to it without spending money on ads?

Thank you so much!

submitted by /u/trentforpresidump
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