Hey I'm new to that crypto game and wanna make some money

Have bought into BTC and have sent it to bitfinex now and wan't to start trading and investing later.
A friend of me who is in the game for while told me that almost all coins are crap and I should hold only BTC and maybe Monero but not now because prices are still too high.
I'm thinking now about to short Ripple, IOTA, Litecoin and Ethereum.
So my question is what is the most worthless shitcoin that make me the most money with shorting and how low can it go?
Well, as long as you can afford your to lose your $10k, it will be easy to start buying any good coins.
What makes you think the price of altcoins now are too high in the market now ? I think this is the most bottom of altcoins.
You may buying some good coins like LTC, DOGE, or XMR. They are good.