It's not enough having an investment plan, knowing the right choice to make for every investment defines the investor better. Take for example jumping on every new coin we find on reputable exchange might not be enough guarantee that coin will do well in the future.
Some coin might have good Supply but low liquidity, some might have high market capitalisation but very poor volatility. Although it's hard to predict the accuracy of a coin performance in the near future this why it is always advised to stick to the known which is BTC.
Another option is to spread ones portfolio amongst different coins but ensuring the have a greater percentage in projects with a visible future. It is better to win small and lose less than lose more and win less
One of the biggest hurdles to get over in investing is just taking the dive and then committing to it. Depending on what type of investing you're interested in, it can take a long time before it even seems worthwhile and that can put a lot of people off. It took about a year of constantly adding funds before I started to see a decent return when taking the dividend approach and many people simply do not have the patience to keep it going. Another thing to avoid is watching the price too closely, as if you're checking on your investments every day you're more likely to stress yourself out and sell at the wrong time, you need to have a plan of action or you might as well start burning your money.