- Never buy at a sudden rise in value but wait untill the market is stabilized.
It depends on the situation so better study the current trend.
There are chances that you can get a decent profit out from buying during the sudden rise. Analyzation must take place here because as always, you will lose money here if you don't play it right and the execution goes wrong.
- Never have more than 20% of portfolio in one coin.
If a coin can be considered as having a cheap price, then why not acquired a lot?
There are people nowadays who holds lots on a specific coin without risking money at their own pocket. How is that possible? By circulating the profit they got from the start, they able to take advantage of every dips resulting on more coins on hoard.