The reason I have half that amount on BTC-e is because it's harder to sell larger amounts on BTC-e than it is on BitFinex and CoinBase. 100 BTC is chump change on BitFinex but considered a damn wall on BTC-e.
Yeah, it is a bit funny how the dynamics of various exchanges work and I have some coins on BTC-e, Coinbase and some others that are more or less pegged to Bitstamp prices. I also have some coins on Gemini, Local Bitcoins, Circle and blockchain.info (for direct trading or buying/selling). I have considered possibilities with Bitfinex and putting coins directly on Bitstamp (and even some other exchanges), but I have not gotten around to it, yet.
I like BitFinex the most. Mainly for the ease of use and being able to sell large amounts without much concern of an order being filled. I like the ability to "hide" orders from the order books. I like the different options for "types" of orders, such as, stops, fill or kill, trailing stops, etc... without using some other trading program, such as, Trading Station, MetaTrader 4 and Ninja Trader.
Yes, I probably should have been more specific and elaborated more in my first post.
Yes, I'm quite bullish on BTC and maybe more invested in terms of percentage of portfolio. I feel as long as one stays on top of it to negate heavy potential losses, there should not be as much risk as one might assume.