hey guys. When Bitcoin's Lightning Network is activated, transaction speed will go up and costs will go down.
And When Tumblebit will be activated Bitcoin transactions can be fully anonymous.
Can anyone explain why I need Dash then? Thanks.
Bitcoin's blockchain capacity will not be augmented by the Lightning network. You will simply have a new off-chain network in which to transact. In a strategic sense it's therefore no different from a Bitcoin backed debit card network, where all the trades occur off-chain except for occasional 'deposits' and 'withdrawals'.
What implication does that have for the core chain ? It's going to ADD to the traffic, not deplete it. Furthermore, you no longer have a fungible, unitary monetary token - it's been split into a 'credit' layer managed by a counterparty and a 'host layer' that's decentralised.
Why you need Dash is because it uses a cash monetary archetype rather than a flawed 'layered technology stack' archetype as its guiding design principle. In other words, in the diagram below, it prioritises the red zone so that
ALL layer-2 client networks are highly supported, not just one.
It will therefore continue to be better store of value than bitcoin.