NexGen Energy's stock surges after Jim Cramer's endorsement, but experts caution against investing due to higher risk and lower upside potential compared to AI stocks.

NexGen Energy's (NXE) shares are up 120% in the past year and 30% since Jim Cramer discussed the firm on Mad Money. The stock surged 51% in January after uranium miner Denison Mines revealed plans to build a mine in Canada. However, it closed 7% lower after the firm's Q4 earnings report showed a wider net loss. Cramer recommends buying the stock and letting it run.