Many points are here to make a successful trade, First you should have ability to do trading. I am talking about skills, if you have skills to know everything very quickly than definitely trading is easy for you. In bitcoin wise, always buy bitcoin in a low price, otherwise bitcoin can't give you profit. Secondly in altcoin trading, many other crypto currencies are here, only buy that coin, which you know that in coming time, it give you double price.
Yes that is right, Learn some skills in trading in order to succeed not only on how lucky your are but also how smart you are in doing trading. If you have enough knowledge then it would be easier for you to take the challenge of the market everyday.
Price of the bitcoin doesn't matter if you are a trader because you trade bitcoin and you know how to grow your bitcoin. Even though we say that you buy bitcoin on 850$ price and we all know that price is very high for an average user BUT you are trader and you already know how to manage risk so you will still gain profit.
In altcoin trading always do research first before deciding to buy the coins that you seem interesting. Don't fall for their good words on their threads and just do your own research and make a conclusion if they suit to your standards on not.