diff --git a/.strict-typing b/.strict-typing
index 5f5a85034d8..d79922d8e7b 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -69,6 +69,7 @@ homeassistant.components.backup.*
 homeassistant.components.baf.*
 homeassistant.components.bayesian.*
 homeassistant.components.binary_sensor.*
+homeassistant.components.bitcoin.*
 homeassistant.components.blockchain.*
 homeassistant.components.bluetooth.*
 homeassistant.components.bluetooth_tracker.*
diff --git a/homeassistant/components/bitcoin/sensor.py b/homeassistant/components/bitcoin/sensor.py
index f8a38bbe470..29a7957fde7 100644
--- a/homeassistant/components/bitcoin/sensor.py
+++ b/homeassistant/components/bitcoin/sensor.py
@@ -20,12 +20,8 @@ from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 _LOGGER = logging.getLogger(__name__)
 
-ATTRIBUTION = "Data provided by blockchain.com"
-
 DEFAULT_CURRENCY = "USD"
 
-ICON = "mdi:currency-btc"
-
 SCAN_INTERVAL = timedelta(minutes=5)
 
 SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
@@ -167,10 +163,12 @@ def setup_platform(
 class BitcoinSensor(SensorEntity):
     """Representation of a Bitcoin sensor."""
 
-    _attr_attribution = ATTRIBUTION
-    _attr_icon = ICON
+    _attr_attribution = "Data provided by blockchain.com"
+    _attr_icon = "mdi:currency-btc"
 
-    def __init__(self, data, currency, description: SensorEntityDescription):
+    def __init__(
+        self, data: BitcoinData, currency: str, description: SensorEntityDescription
+    ) -> None:
         """Initialize the sensor."""
         self.entity_description = description
         self.data = data
@@ -231,12 +229,10 @@ class BitcoinSensor(SensorEntity):
 class BitcoinData:
     """Get the latest data and update the states."""
 
-    def __init__(self):
-        """Initialize the data object."""
-        self.stats = None
-        self.ticker = None
+    stats: statistics.Stats
+    ticker: dict[str, exchangerates.Currency]
 
-    def update(self):
+    def update(self) -> None:
         """Get the latest data from blockchain.com."""
 
         self.stats = statistics.get()
diff --git a/mypy.ini b/mypy.ini
index 53cf4726a82..e16e6534ec9 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -443,6 +443,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.bitcoin.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.blockchain.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true