you are right these 3 categories are in hype nowadays. specially layer2 because of their airdrops and other lucrative features for crypto traders. there are so many Layer 2 and Layer 1 Projects out there.
Yes, i agree. These 3 items are very practical. In particular, I am quite focused on Layer2. Although L2 on ethereum was airdropped quite loudly, in a more special case, Layer 2 on bitcoin is also attracting a lot of attention and is likely to explode in the future. After the Halving, it became even more optimistic. I'm giving my attention to SOV. In addition, I think a few small niches still have the potential to return, which is gamefi/metaverse...