Too many speculative names fueled Monday's rally, Jim Cramer says
1. Speculative stocks rallied, causing concern for overall market leadership. 2. S&P 500 rebounded 1.56%, recovering 56% of previous losses. 3. Trump's tariff rhetoric influenced a $2 trillion market value loss. 4. Broadcom's deal with OpenAI contributed to tech sector gains. 5. Cramer expresses concern over the volatility of speculative investments.