san francisco republican presidential candidate donald trump tuesday warn dangerous financial bubble form technology industry silicon valley respond collective eye roll reuters interview new york billionaire say technology start-ups never earn profit able sell share high price liken situation overheat stock market 2007 talk company never make money bad concept value billions dollars go trump say many tech watchers repeatedly warn tech bubble number private company value billion know unicorns soar 163 accord venture capital research firm cb insights trump declaration eye silicon valley entrepreneurs venture capitalists nothing new investors others take twitter poke fun trump campaign slogan make america great repeat phrase make bubble great again finally someone call marc andreessen general partner prominent venture capital firm andreessen horowitz tweet mock trump interview trump say high valuations tech start-ups able fetch today remind 2007 overheat house market help drive u.s. stock unsustainable valuations bubble burst stock market strange presumptive republican nominee say look tech stock weak concept company sell much money would say ever happen think could happen again startup founder reject trump generalization company burn cash overvalue certainly many last several months correction start rectify years exuberant investments still company continue raise money successfully turn profit far say dumb things seem get dumb dumb vivek wadhwa entrepreneur stanford university fellow tell reuters go tweet comment call peter thiel say buddy thiel influential investor well-known contrarian ideas one silicon valley leaders openly support trump thiel immediately available comment nothing trump track record show meet technology leaders know industry know innovation say aaron ginn co-founder lincoln initiative community promote libertarian technology-friendly value ironic ginn say give much technology especially twitter help trump campaign say things things make entertainment ginn say read interview trump silicon valley mock trump tech bubble warn