Steem underpricing is temporary
Currert Steem capitalization: $ 135,094,275
Instagram: over $ 1,000,000,000
Twitter: $ 13,500,000,000
Facebook: $ 356,100,000,000
Steem is not so popular yet, but:
1.Everyone use Google.
2.SteemIt users have motivation to generate new content.
You think we will ever reach $Billions?
It all depends if there is demand for steem the currency. It doesnt even need to reach critical mass as long as the demand for steem is there. I wrote a post about this but no one seem to care https://steemit.com/steem/@snowflake/fu-k-this-bs-today-ima-gonna-be-on-the-trending-page
I think that 0.5 of Instagram is easy possible.