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I aim to add assets from the top 50 to my portfolio as they have potential for long-term profit. Although returns may be lower than on altcoins, it is a more secure option.
Before you decide to put all the top 50 coins in your investment portfolio - I hope you do some analysis and research. Not all the coins you currently see in the top 50 will give you an advantage - some of it is due to ranking manipulation. Don't believe what you see if you don't do a thorough analysis.
Carefully decide on an investment plan - even if you only have a low budget for each of the selected investment assets. All altcoins are highly dependent on bitcoin - so you should know which one is better for getting a large portion of your portfolio in the long term.