Yes there's many trusted ways to buy any coin that you love and want to buy to hodl but first you must understand that the tokens that you're getting interested in are memecoins and don't have the chances to increase in price that much anymore as they have gone passed their days of being hyped, maybe only Dogecoin still has some potential as it's being mentioned always on social media and has the support of Elon musk and president Donald Trump. If you're still going ahead to buy them, don't use all your life savings but only invest a few percentages of your savings and you can use any top exchanges from coinmarketcap.com that accept US citizens to buy.