As you have seen, there are many posts advising you to hold this coin and if you have a lot of time, you can start trading by buying another coin, then go back to buy Dogecoin with the profit you received through trading.
No one knows if the price of Doge will continue to rise, but with the 500 Dogecoin you currently have, you can take a 2% profit by trading or staking it on exchange platforms that support Dogecoin staking.