It does not matter at what point you enter the market for a coin if you believe in the long-term. Bitcoin was once expensive at $1; it was then expensive at $10; people could not believe it when it hit $100; people could not believe it when it hit $1,000 and when it hit $10,000 they called it a bubble. It could be $25,000 next year or drop back below $5,000. My only advice here is not to chase something during a parabolic upwards move because it will almost certainly come back down. 
Needless to say, Bitcoin’s place as an alternative digital asset among cryptocurrencies has become entrenched, despite likely headwinds it will continue to face as it evolves further. The U.S. Securities and Exchange Commission (SEC) announced in early August 2017 that certain Initial Coin Offerings (ICOs) – which use cryptocurrencies for financing – would be regulated as securities.
Known for handling one of the largest Bitcoin volumes out of all the crypto exchanges globally, Bittrex allows you to decide the trading rates with a service fee of around 0.25%. Moreover, a lot of your time will be saved as the verification process in Bittrex is pretty fast which allows you to start the trading process without any major halt. The platform supports two types of accounts namely, Basic and Advanced with withdrawal funds up to 3 BTC/day to 100 BTC/day, respectively.

The top of the order book will show you the lowest price at which someone is willing to sell a cryptocurrency, and the highest price at which someone is willing to buy it — but that doesn’t mean you can buy or sell the amount you want at that price. In fact, the amounts of a cryptocurrency that people are offering to buy or sell at the top of the order book are often quite small, which means that, if you’re trying to buy or sell a larger amount, you’ll have to go deeper into the order book: finding a counterparty who’s offering a price that isn’t as good as the “market price.”
No, the successful trader is not me. I’ve gotten lucky a few times and I’m still refining and trying out strategies; on the other hand, I’m part of communities of people who trade on a daily basis to grow their portfolios, and while some of the results can be attributed to luck, a majority of it is based on fundamentals, good habits, and experience.