I just recently began contributing to my roth but have yet to actually invest the money in something. I am reading a lot about how ETFs are a better option than MFs. I've seen that many people think VOO is a good place to put your money. I'm just curious, as of today it is at 638.31. Would that be considered too high to buy it at? Should I wait for it to go down or would you just go ahead and buy?