You need good trading skills to be a successful trader so try to learn about the crypto world thoroughly before starting trading and i think it is better to start your trade with the bitcoin because it is king of the cryptos so first start trade with bitcoin and spend more time to watch what is happening on the bitcoin market then you will get the knowledge of how to trade and when to trade.I think big investment will gives us good profit because bitcoin price keeps increase so if you have huge amount then it will give good profits when the days passes.