A comment about all the people that are saying Dragon isn't risky:
I agree with what you are saying regarding the fact that it's tried and true. What's stopping a Dragon typed CAP4 from being safe and not risky? Here's a few reasons why Dragon will make CAP4 not risky:
Dragonite takes half damage at full health, so he could never withstand an attack or return with his puny 134 Atk or measly 100 SpA. Haxorus has an even more pathetic 147 Atk, and couldn't destroy a Dragon CAP4, which would be too difficult anyway with his 97 speed. And then Hydreigon has only 125 SpA and 100 Atk, so ha can't do anything either. Lati@s doesn't have good SpA either, and their defenses can't hold up to anything, and their speed is snail-like. Salamence only has 130 Atk, which is absolutely pathetic, meaning he can't do anything either. The only Ice-types in OU, Cloyster and Mamoswine, can't use Ice Shard or any other Ice type move, so they clearly can't counter a Dragon.
For those of you who couldn't tell, that was sarcasm. Dragon is risky because of Dragon. All of the Dragons in OU are major sweeper threats, and could easily smash Dragon CAP4 if given the chance. At the same time, Dragon CAP4 could do the same, embodying the high-risk-high-reward concept in the first place. The OU Ice types (not counting Abomasnow, who could get in a crazy Blizzard I guess, although he is not necessarily used for that) have Ice Shard, giving an easy revenge kill on CAP4 after it's been weakened by its risky moves or other Pokemon.
(Edit: I stand corrected, Abomasnow does get Ice Shard. Either way, he can set up Blizzard to punish Dragon CAP4 for being Dragon)
Long story short, Dragon can be a risky type if we don't make a pseudo-legendary/actual legendary, as most OU Dragons are. And I assume we're not