I have best way how to get profit with your money in trading with low risk, if you have much money never put in one altcoin kind only, example if you have 1 BTC never use for buying or trading in one altcoin kind, but use for trading with five or ten altcoin kinds because when your one altcoin trading lost could take recovery for other altcoin.
I understand your point, but your method is just one of many, and to be frank, it's not always "the best" method.
Yes, your method may be the safest route but think about traders who can afford to risk large amounts and preferably gain larger amount. Spreading your trades to altcoins(mostly shitcoins) that don't even have the potential to be a catch is just a waste of money and time.
I'd say be active in the charts and make your decisions to where your investments will go, AND don't spread too much, why(?), because you may have greens in your transaction history but only gains little, you may as well invest in a more profitable one.