1. When I start to take profits from my altcoins do I just sell them on the exchange for dollars and then buy stablecoins with that? Or do I somehow trade the alts for stables? Does is matter since selling or trading them are taxed for capital gains regardless?
you already sold them for dollars so why would you still need a stablecoin ? maybe you mean you cashed out ? thats fine but if you dont feel cashing out then you can trade em with a stablecoin .
2. Once I take the profits in stablecoins, is putting them on something like Blockfi to gain interest the best thing to do while I wait for another dip to possibly reinvest them?
not sure if i heard that blockfi before or i only forgot it but if its trusted then thats a good idea to earn passive income than hodling your stable coin and earn nothing .
3. Once the bull run is over I'm most likely going to keep all my bitcoin and probably most of my Ethereum. I'll sell most of my alts for stablecoins but keep small bags of the ones I want to keep through the bear market. Is this a sound strategy?
heck yeah that is a nice strategy . good thing you dont forgot to have a top coins like btc and eth because they are more important than a stable coin .
4. During the bear market is taking a cash loan using my crypto as collateral (BTC and ETH) a good way to defer capital gains taxes? Won't I have to pay these taxes eventually? I know there are drawbacks to this strategy but it seems like a lot of experienced people do this.
if you consider your self as an experience person and think you can benefit with this why not ? but to me it looks risky
5. After the bull run should I just put my stablecoins in something like Blockfi during the bear market? Or is cashing out to dollars and investing in something like real estate a good way to defer capital gains taxes?
you already ask the blockfi thing earlier but the other one i think that was a good idea to diversify .