Bungie Studios has confirmed that over the next ten years, your destiny characters will transfer through games, so you won't have to worry about restarting.
Destiny, created by Bungie Studios, was released in September 2014 to a mixed reception, and to follow two expansion packs, The Dark Below and House of Wolves, were also released to further extend the game's roster of activities and content. With the future in mind, Bungie has confirmed that your playable character will carry over through the years of Destiny games, this information relaying from GameSpot.com. Destiny's lead engineer, Luke Timmins, explained that, "We certainly take it seriously that Destiny is a ten-year thing. It's a long-term thing and with these adventures that we're adding my contract to you--and any player--is that your Guardian will always be there." With this in mind, they confirm that they want you to continue on the saga as your own character, but whether weapons, gear, and other items like that will transfer along with your personal Guardian is a mystery. It is also unknown if you'll be limited to transferring only one character to future games and major expansions. The next adventure in Destiny, The Taken King, will be released in September of 2015 and Bungie has confirmed that another game is in the works. Rumor also has it that two other expansions will follow The Taken King, but details about these are unknown.
All information and images sourced from Bungie Studios, Activision, and Luke Timmins.