The REALLY great thing about Bitcoin is there NO experts.
The established financial media (Economist, New Statesman et al) are all calling BTC's exponential growth a bubble - a crash waiting to happen. This may or may not be true. Bitcoin is not a stock.
Seasoned traders are all calling the top way too early and getting back in when BTC bounces back and carries on where it left off. Bitcoin is not like any other currency.
The clever people were those who bought and held, through the 2011 crash, through the flash crashes of the last few weeks and who continue to hold.
There are those who are trading and saying they are trading well but in my humble experience an upwards market will reward everyone. If you've lost money on BTC any time this year you truly are a bad trader!
This is all new territory. Whether the US government tries to stamp it out of existence or whether it becomes a fiat currency, no-one can be sure.
We can only point to analogies and guess.
Buy what you can spare, forget about it and enjoy the ride, that's my advice