Is now a bad time to enter the US market, particularly due to the high SGD to US exchange rate?

I figured investing in ETFs now is good, and wanted to adopt a global strategy, but I hesitate to put all my money in the US market now, because I'm concerned that the US currency now is inflated, and they are constantly "printing" money at a crazy rate; hence when things stabilise I suspect US currency will depreciate, along with a "loss" in my earnings in the stock growth. Please help me understand if my logic and concern is correct?