Are we back in the tulip days of the Internet? I lived through it in Silicon Valley from the years 2000-2003 (the best years for humility-inducing training for a tech entrepreneur and investor, in my opinion). Facebook at a $113.5 billion market cap (well above their IPO price, BTW)? Twitter at a $22.3 billion market cap as a newly public company? Snapchat at a $3 billion private valuation with only around 30 employees? There is no doubt that we have had major valuation movements recently, including Google now being worth $344.7 billion - to put that in context, Walmart is ranked #1 on the Fortune 500 and is worth $259.9 billion. Apple remains the world's most valuable company at $467.7 billion, with Exxon Mobil in second position at $415 billion and ranked #2 on the Fortune 500. Tech is clearly beating the old world as the world's most valuable companies. But Snapchat, a company with no revenue, at a $3 billion private valuation? When valuations soar like this, I think it is time to pause and ask some questions.