I highly doubt 15k by the end of the month:

As of now BTC is @ 10 092.90$ USD...

I can see 2 things happening next week with BTC:

By looking at the charts i say It's either gonna gain or lose 2k by the end of the month!

First scenario - BTC goes up to 12.5K by next wednesday before going back down to 12k by the end of next week!
If that's the case i think BTC will hit the 15k mark by the biginning of April (My predictions)

2nd scenario - BTC goes down to 8k by wednesday befofore going back up to 9k by the end of next week!
If that's the case i think BTC will hit the 15k mark by the biginning to mid May (My prediction)

You should consider a number of parameters to judge and find out the
best Bitcoin/cryptocurrency exchange:

- Witch country you are in?
- How safe is the website and server? Secure exchanges are better.
- High liquidity.
- Transaction fee structure of the exchange like fixed fees, percentage
- fees and spread.
- Whether exchange provides transparent data of coins transactions, prices,
and volumes?
- How many and which currency pairs are available to trade Bitcoin, for
example USD, Euros, and other fiat /government issued currencies, or
Altcoins?
- Multiple options to buy Bitcoin like PayPal, credit card, etc.
- Are customers happy?
- Beginner-friendliness.
- Good user ratings.

Here's some of the top exchanges:

- Coinbase
- Bittrex
- Kraken
- Bitfinex
- Coinmama
- Localbitcoins
- Gemini
- Bisq
- Cex.io

New one (I havn't tried it do) USA only
- Robinhood App (Customers in California, Massachusetts, Missouri, Montana and New Hampshire states only)
Zero bitcoin fees