Obviously, I need BTC to get in but it seems like everything is high right now. Should I wait till BTC is < 2k? Or ETH < 200? I'd like to get in and start trading alt coins. But for me to maximize my profits in USD I need to wait till BTC is at a reasonable cost. Or do you guys see it climbing to 3k in the next couple of months?
You should only make investment if you are ready. The means of ready is when your knowledge is enough and you have technical analysis skill where you can use in order to make profit in trading of cryptocurrencies.