Portfolio advice

Hey everyone,
I’ve been building a high-conviction portfolio focused heavily on the physical and computing layers of AI infrastructure. I’m strictly long-term and don't care about short-term volatility, but I’d love to get some brutal feedback on my allocations.
Here is my current breakdown:

• Nebius Group (NBIS): Bought at $83.46 (currently $219.94). Holding about 99 shares. Up +164.53%.

• Micron Technology (MU): Bought at $267.70 (currently $724.38). Holding 14.6 shares. Up +169.76%.

• Vertiv Holdings (VRT): Bought at €90.17 (currently €319.15). Holding 20 shares. Up +253.94%.

• Alphabet (GOOGL): Bought at $172.23 (currently $396.74). Holding 15.5 shares. Up +119.94%.

• Broadcom (AVGO): Bought at $217.18 (currently $425.65). Holding 12.9 shares. Up +89.12%.

• Rocket Lab (RKLB): Bought at $47.48 (currently $124.74). Holding 43 shares. Up +161.22%.

• TSMC (TSM): Bought at $165.69 (currently $404.50). Holding 10.3 ADRs. Up +141.31%.

• Amazon (AMZN): Bought at $198.53 (currently $264.20). Holding 15.5 shares. Up +25.34%.

• Meta Platforms (META): Bought at $562.99 (currently $614.46). Holding 6 shares. Up +5.05%.

Am I dangerously over-concentrated in one sector, or is this specific infrastructure play the smartest way to exploit the secular AI trend? Let me know your thoughts or where you think I’m blind. Roast my portfolio. Anyone have tips on more stocks to follow i’d also like to hear it!