1) Build a diversified portfolio
Beginners put all their eggs in one basket while a professional would know what to do exactly. The smarter approach is to build a diversified portfolio based on market cap, tech and team behind the project. This decreases the risk of incurring losses.
I do not consider diversified portfolio invest in bitcoin and altcoins, for me to diversify portfolio would be:
1 - invest in bitcoin
2- Investing in gold
3 - invest in properties in real world
5) Losses are a part of the process
Traders and investors trading in crypto including the novice traders need to know like in any business ROI in crypto trading doesn’t come easy. It's important to remember that losing helps your learn, make changes in the strategy and improve your chances for better results. There is never enough research for finding the right strategy, you should keep working at it and try working on new strategies regularly to cope up in every market condition
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it hurts a lot to lose, but as you said, losing is part of the whole process