Utilities isn't the end, if you are smart then you should know that it's just the beginning, just because many are advicing you to invest in coins with good utilities doesn't mean once you find one it's a home, remember that even after a good utility the success of the project still depends on the team and dev capabilities so invest only what you can afford to lose
Well, when it comes to investment in coins, bitcoin still stands out as a coin you can trust but in order to make profit, it all falls down to your investment plan. You ought to have a plan that isn't stiff but flexible to adjustment due to the unpredictable nature of the market. You have to be ready to wait a long time should the market be experiencing a bear market or when your desired profit haven't resulted. Should you be a trader, its about your experience with the market.
Taking a page in altcoins is where it becomes really difficult because, there are a lot of shit coins and as such, the liklihood of being met by a scam project is almost certain. In anyway, the investment rule still stands. Invest only what you can afford to loose. Its the closest way to safety.