It involves a viral volume of users like snapchat or tinder. How can I theoretically support this in front of an investor?
Could you be more specific? This is too abstract. In particular, do you mean you don't intend to have a revenue model at all? Do you already have users?
There is a fundamental problem if I understand correctly your question. If your business will become profitable only if there will be viral addoption of your product / app (by luck or magic), there is no way to bring investors on-board.
What you need to demonstrate is that even under prudent and conservative assumptions you can still become cash flow positive at one point of time, and that the market you are penetrating is big enough to pay-off several years of negative cash flow.
The best is to focus on your business model and how you will scale operations to contain costs when users numbers grow. Using exponential growth of users / revenues in your projects is probably the first reason investors will not call you for further conversation.
Investors are interested primarily in ROI and Rates of Return. They will only show some interest if your product/idea has potential. They also look at the those involved in driving the project. If you team is so great, your idea is so big, your idea so amazing, and you have gained some traction in getting interest, then all you have to do is show them proof of this. Have you got a Business Plan? Is it bankable?
Among other things you need to have ready with your Investor Pack/Pitch Deck is the following:
1) Project Status - Operational/Non-Operational
2) Opportunity Study - Yes/No
3) Phase of Operation
4) Pre-Feasibilty Study - Yes/No
5) Feasibility Study - Yes/No
6) Business Plan
Hope this helps
you should roll out an MVP first and get some initial users sign up on your platform. this would validate your concept and then reach out to investors.
Tinder and Snapchat both have significant revenue.
More to the point, both had revenue plans at every funding stage, even before they had revenue. The plans were somewhat vague at first but they got better over time.
Why do you have the impression VCs are only interested in $? Every single day, millions of $ are invested in branding, improving the image of the firm and the like, though they know they will be SPENDING more money on those activities...
Try to sell the idea by telling your investor not why you love it, but how it could help them