"Shares resume fall" - I think you really mean it resumes being a super volatile stock. On a weekly basis it gains and drops 10-15%. I know because I buy when it drops 10-15% then sell when it pops back up. I've made over $20,000 trading on Nvidia volatility alone.
It used to stress me out, until I realized that I could profit off the volatility.
I don't think this is an effect of the bubble bursting. This week it swung from Friday closing around $148 to this week bottoming out at $118. Currently it's trading at $121 which is fairly normal for its range within the last 3 months. It's been averaging around $120-135 for the last 3 months. I know because I trade on it weekly. The sudden "investor confidence" is mostly the excitement of the AI super investment by Trump, hence the valuation up to $148 (Wish I had a sell order at 145 not 150, I would be in the money so much).