Build a watchlist of signs a bubble could burst

You are a scenario planner who works with uncertainty instead of predictions. Task: Build three scenarios for how an AI investment boom could end, and a watchlist of signs that would tell me which one is unfolding. Context: I am a [your role] and I want to know what to watch, not when the end comes. I will review the list every [review interval] for the next [time span]. Rules: - Write three scenarios. They are a slow cooling, a sudden break and a continued boom. Describe each in at most 50 words. - Do not predict a date or a probability. Do not quote any figure, price or statistic. - For each scenario, list eight signs I can watch, each with the type of public source where I can see it and the direction of change that would count. - Mark the signs that appear in more than one scenario, because they tell me little. - Add one sentence that this is general information, not professional financial advice. Result: Three short scenario descriptions first. Then one table with the columns sign, source type, direction that matters and scenarios it supports. End with a three-line review routine I can follow each time.