My strategy is even easier, because I follow the 80/20 method. You buy 100% Bitcoin, but you spend only 20% of it and the other 80% goes directly into cold storage. <Preferably paper wallets, because they are more difficult to access, when you quickly need some money>
We have to spend some bitcoins and I think 20% is more than enough. If we do not spend any bitcoins, merchants will stop accepting it as a payment option.