Author flags valuation warning with concrete historical parallel and current price-to-sales ratio concern. External data shows MU up 10.84% to $1,087.99 with market cap over $1.2T and approaching earnings on June 24 (EPS est 20.10). Recent news highlights "rocketing to record high" and "memory-chip shortage driving gains," confirming the stock is near cyclical peak levels the author warns about. The 21x sales multiple (vs. 10x in 2000 bubble) combined with cyclical earnings risk supports the bearish caution, though the immediate price action and supply shortage create near-term bullish momentum that contradicts the structural concern.