Are you willing to invest USD10,000 or more in a currency which seems to be static at the moment and keep it for 5 years or longer?
You hope that, after 5 years or longer, the price of the currency will go very high.
Are you patient enough? Or could you sell the currency for other currencies when you see that the currency shows no progress after one or two years?
What do you mean by using the word "static". It's mean that your coin's price unchanged?

Like USDT, PAX or something like that.
I guess you refer the solid and legit coins, right? I think to make the safest, you should hold BTC.