Long-term investment ≠ blind holding
There is a difference between investing in Bitcoin or Ethereum (which are considered "stores of value" like digital gold) and small coins.
Personally, I keep 60% of my portfolio in large coins (BTC, ETH) as a hedge against risks.
The remaining 40% I allocate to emerging projects, but with a monthly review: if the project fails to meet its plan (such as delays in updates), I sell without hesitation.